11885869 has 4 divisors (see below), whose sum is σ = 11896380. Its totient is φ = 11875360.

The previous prime is 11885857. The next prime is 11885899. The reversal of 11885869 is 96858811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10323369 + 1562500 = 3213^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 11885869 - 2⁵ = 11885837 is a prime.

It is a super-2 number, since 2×11885869² = 282547763770322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11885899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3322 + ... + 5899.

It is an arithmetic number, because the mean of its divisors is an integer number (2974095).

Almost surely, 2^11885869 is an apocalyptic number.

It is an amenable number.

11885869 is a deficient number, since it is larger than the sum of its proper divisors (10511).

11885869 is an equidigital number, since it uses as much as digits as its factorization.

11885869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10510.

The product of its digits is 138240, while the sum is 46.

The square root of 11885869 is about 3447.5888676001. The cubic root of 11885869 is about 228.2147164227.

The spelling of 11885869 in words is "eleven million, eight hundred eighty-five thousand, eight hundred sixty-nine".